Hey guys! I have been working on a game called Dodge the Bullets. You are a small bullet with a gun moving around in 2D but in 3D world. You have a gun to shoot other turrets that spawn over your head. It have five difficulties beginner, easy, medium, hard and expert. After some time on hard and expert will the ground be moving. Higher the difficult the faster will the turrets shoot, the spawn rate will increase and more turrets will spawn.

I want do the game better but I don't know what I should change in the game.